A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory handling and result in memory corruption.

The version of webkitgtk4 installed on the remote host is prior to 2.52.6-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3917 advisory.

    A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari     26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing     maliciously crafted web content may lead to an unexpected process crash. (CVE-2026-64715)

    A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari     26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing     maliciously crafted web content may lead to an unexpected Safari crash. (CVE-2026-64779)

    The issue was addressed with improved checks. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS     18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously crafted web content may     lead to an unexpected Safari crash. (CVE-2026-64780)

    An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in Safari     26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing     maliciously crafted web content may lead to an unexpected Safari crash. (CVE-2026-64784)

    This issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS     18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously     crafted web content may lead to an unexpected Safari crash. (CVE-2026-65331)

    This issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS     18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously     crafted web content may lead to an unexpected Safari crash. (CVE-2026-65333)

    A memory corruption issue was addressed with improved state management. This issue is fixed in Safari     26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing     maliciously crafted web content may lead to an unexpected Safari crash. (CVE-2026-65334)

    This issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS     18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously     crafted web content may lead to an unexpected Safari crash. (CVE-2026-65335)

    This issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS     18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously     crafted web content may lead to an unexpected Safari crash. (CVE-2026-65336)

    This issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS     18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously     crafted web content may lead to an unexpected Safari crash. (CVE-2026-65337)

    The issue was addressed with improved memory handling. This issue is fixed in Safari 26.6.1, iOS 18.7.10     and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously crafted web     content may lead to an unexpected Safari crash. (CVE-2026-65338)

    This issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS     18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously     crafted web content may lead to an unexpected Safari crash. (CVE-2026-65340)

    The issue was addressed with improved memory handling. This issue is fixed in Safari 26.6.1, iOS 18.7.10     and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously crafted web     content may lead to memory corruption. (CVE-2026-65341)

    A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to     improper memory handling and result in memory corruption. (CVE-2026-78376)

    A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to     improper memory handling. (CVE-2026-83596)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0965 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2026-78376:
    A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to     improper memory handling and result in memory corruption.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to     improper memory handling and result in memory corruption. (CVE-2026-78376)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
345783	Amazon Linux 2 : webkitgtk4 (ALAS-2026-3917)	Nessus	Amazon Linux Local Security Checks	Local	high
342613	TencentOS Server 4: webkitgtk (TSSA-2026:0965)	Nessus	Tencent Local Security Checks	Local	high
339187	Linux Distros Unpatched Vulnerability : CVE-2026-78376	Nessus	Misc.	Local	high

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CVE-2026-78376

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